Plastics Matières plastiques 8 Polymers 6 Plastics industry and trade 5 Polymères 5 Elastomers 3 Environmental aspects 3 Polymerization 3 Polymérisation 3 Recycling 3 Rubber 3 Macromolecular Substances 2 Polymer Chemistry 2 polymers 2 35.80 macromolecular chemistry 1 58.22 polymer technology 1 Additives 1 Adjuvants 1 Biodegradation 1 Caoutchouc 1 Chemical Engineering 1 Chemistry 1 Composite materials 1 Composites à fibres 1 Computer-aided design 1 Crushing machinery 1 Economic aspects 1 Engineering and Technology 1 Environmental Pollutants 1 Environmental protection 1